The meteorological satellite named Fengyun-3D (FY-3D) was launched on November 15th, 2017 (UTC+8). The Global Navigation Satellite System (GNSS) Occultation Sounder (GNOS) is loaded on the FY-3D, which can use the received the GNSS signals including Global Positioning System (GPS) and Chinese Beidou (BDS) to detect the global atmosphere. The combination of FY-3D and FY-3C plays an important role in improving the accuracy of atmospheric detection and enhancing the detection of space environment and meteorological remote sensing capabilities. Radiosonde data from 201 stations around the world are used to evaluate the FY-3D radio occultation (RO) wet profile products (temperature and specific humidity) in 2020. The results show that the bias between the temperature profile of FY-3D and radiosonde is about −0.0073 K, and the mean standard deviation (STD) is 1.84 K at 15 pressure layers. In the range from 925 hPa to 250 hPa, the bias between specific humidity profile of FY-3D and radiosonde is 0.2 g/kg–1.7 g/kg at 7 pressure layers, and the mean STD is about 25%. The results show that the RO wet profile products of FY-3D in 2020 have reached a high precision, the temperature profile is 8% higher than that of FY-3C, and the quality of specific humidity profile is comparable to FY-3C.
Evaluation of FY-3D Radio Occultation Wet Profiles with Radiosonde Measurements
Lect. Notes Electrical Eng.
China Satellite Navigation Conference ; 2022 ; Beijing, China May 22, 2022 - May 25, 2022
China Satellite Navigation Conference (CSNC 2022) Proceedings ; Kapitel : 19 ; 199-208
2022-05-07
10 pages
Aufsatz/Kapitel (Buch)
Elektronische Ressource
Englisch
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